| Replacing valve stem seals |
Subject: Replacing valve stem seals by Subman on 2008/6/25 7:01:12 91 L98 with Auto trans - 142,000 on the clock. Notice some smoke when starting after over night parking about a month or so ago. A necessary pickup coil replacment (the car just quit) gave me the reason and time to pull a compression test. 218-220#'s on 1,2,3,5,6,8. 212#'s on 4 and 208#'s on 7. All dry, and after running SeaFoam through it a week before. It is now smoking on start up after sitting for 3 or 4 hours and occasionally if I am sitting in traffic. I installed 2 separate switches to turn on the fans so I don't typically let the car get any hotter than 200* and never let the fans come on by them selves. So all of this leads me to believe that I could use some new seals. I have seen a pneumatic insert to keep the valves in place while you remove the keepers and springs to replace the seals. After replacing every thing, release the air pressure and move on to the next cylinder. Since I have never used one of these tools, I'm just looking for tips and tricks on using one, or reasons for NOT using one. I have always pulled the heads, sent 'em for machine work, and reinstalled complete. I could do that now, but would rather not as it's a daily driver and I don't have the time to dick around with it. So - If any one has experience doing this with the heads still on the car, I'd appreciate hearing from you! T.I.A. Subman |
